Partikel A dan B masing-masing bermuatan +8 mu C dan +18 mu C. Titik C terletak di antara partike...

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26 Dec 202303:02

Summary

TLDRIn this video, the presenter discusses an electric field problem involving two charged particles, A and B, with charges of 8 microcoulombs and 18 microcoulombs, respectively. The point C is located between them, 2 cm from particle A, where the total electric field is zero. By applying the formula for electric fields and equating the fields from particles A and B, the presenter derives the distance between the two particles as 5 cm. The explanation emphasizes the importance of understanding electric fields and offers a clear step-by-step breakdown of the problem-solving process.

Takeaways

  • 🔌 Two particles, A and B, have electric charges of 8 microcoulombs and 18 microcoulombs, respectively.
  • 📏 Point C is located between particles A and B, 2 cm from particle A.
  • ⚡ The electric field at point C is determined to be zero.
  • 📐 The distance from point C to particle B is denoted as 'x'.
  • 🔍 The formula for electric field strength (E) is given as E = k * q / r².
  • ⚖️ To find equilibrium at point C, the electric fields due to particles A and B must be equal: E_A = E_B.
  • ✏️ The equation simplifies to 8 / 4 = 18 / x² after canceling constants.
  • 🧮 Rearranging the equation gives x² = (18 * 4) / 8, leading to x² = 9.
  • 📊 The positive value of x is calculated as 3 cm.
  • 📏 The total distance between particles A and B is thus 3 cm (from C to B) + 2 cm (from A to C), equaling 5 cm.

Q & A

  • What are the charges of particles A and B?

    -Particle A has a charge of 8 microcoulombs (μC) and particle B has a charge of 18 microcoulombs (μC).

  • How far is point C from particle A?

    -Point C is located 2 centimeters (cm) away from particle A.

  • What is the relationship between the electric fields at point C from particles A and B?

    -At point C, the electric field from particle A is equal to the electric field from particle B, resulting in a total electric field of zero.

  • What formula is used to calculate the electric field due to a point charge?

    -The electric field (E) due to a point charge (Q) is calculated using the formula E = kQ/r², where k is Coulomb's constant and r is the distance from the charge.

  • What steps are taken to find the distance between particles A and B?

    -The problem sets up the equation E_A = E_B, simplifies it by canceling constants, and then solves for the distance from C to B, ultimately adding the distances from A to C and C to B.

  • What value does 'x' represent in the problem?

    -'x' represents the distance from point C to particle B.

  • What is the final calculated distance from point C to particle B?

    -The final calculated distance from point C to particle B is 3 centimeters (cm).

  • How do you find the total distance between particles A and B?

    -The total distance between particles A and B is found by adding the distance from A to C (2 cm) and the distance from C to B (3 cm), resulting in a total distance of 5 cm.

  • Why is the negative root not considered when solving for 'x'?

    -The negative root is not considered because distance cannot be negative; only the positive value is physically meaningful in this context.

  • What conclusion can be drawn from the electric field being zero at point C?

    -The conclusion is that the forces exerted by the two charged particles on a test charge at point C are balanced, resulting in no net electric field at that point.

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Electric FieldPhysics ProblemCharged ParticlesEducationSTEMScience TutorialDistance CalculationLearningProblem SolvingStudent Resources
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